Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???

Any help would be greatly appreciated.

2. Originally Posted by BaBrown1s
Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???

Any help would be greatly appreciated.
Probability of getting any one question right when choosing at random is $0.25$ (four possibilities, only one of which is correct).

Probability of getting three out of three right is $0.25^3$.

CB